Brochure/Catalogue

M12 D-coded
M12, D-coded is a 4-pole plug-in connector variation for
Industrial Ethernet according to ISO IEC 61076-2-101.
It carries out data transmissions according to Cat. 5 and
guarantees IP67 protection.
M12, X-coded (X-type)
M12 X-coded is an 8-pin plug connection variation for
Industrial Ethernet according to IEC 61076-2-109. It
performs the data transmission as per Cat.6
A
and ensures
protection class IP67.
MAC Adress
The MAC address is the six byte long hardware address that
uniquely identies a node in the network. The MAC address
is hard-coded onto a chip and cannot be manipulated. MAC
addresses are assigned according to a particular key that
includes unique adapter recognition, identication of the
manufacturer and an ID for operating and managing.
Manchester Encoding
Signal encoding where the binary information is shown
by the sign of a change in voltage within the bit time. This
means that transmitters and receivers are very easy to
synchronise, as the transfer in the middle of the bit time
produces a reliable frequency. The rst half of the bit time
includes representing the complementary bit value to
be transmitted, the second half represents the bit value
(specied for IEEE 802.3 Ethernet and used in 10 Mbit
networks).
MDI
The Physical Medium Attachment (PMA) and the Medium
De pendent Interface (MDI) both form the actual transceiver
(MAU) for the 802.3 standard. The MDI is the physical
(electrical, optical) and mechanical interface up to the
medium. In the different 802.3-types the interface has a
different structure.
MDI-X
MDI stands for Medium Dependent Interface and refers to an
Ethernet connection. Auto MDI/MDIX (autocrossing) makes
the automatic modication of the transmitting and receiving
line of a port possible, i.e. the connected Ethernet cable
(crossed/uncrossed) and the conguration of the opposite
station (MDI/MDIX) are recognised automatically and its
own port is congured appropriately. So all auto MDI/MDIX
ports can be used as uplink port.
Media converters
Media converters connect different types of cable and
maintain the structure and the functions of the network. In
its simplest form a media converter is a quadrupole in the
form of a box or network adapter card with a power supply.
It modies different cables – coaxial cables, TP-cables and
FO cables – and different plugs to t one another. In this
way media converters can for example be used to modify
100Base-TX to 100Base-FX or to convert monomode
bres to multimode bres. By using media converters the
boundaries of network extension can be increased by using
bre-optic routes. In addition, existing networks can be
inexpensively integrated into new network concepts. The
Weidmüller range includes media converters on copper-
based 10Base-T or 100Base-TX on bre-optic transmission
and vice versa.
MIB
Management Information Base is a description for network
devices that is used by network management tools to read
status information and to transmit control information to the
device.
Multicast
Multicast is a type of transmission from a single point to
several subscribers at the same time (group).
Multimode
Refer to FO
NIC
A network adapter board is a circuit board or another
hardware component that connects the network directly
with the terminal equipment. It can be a plug-in board for the
bus system in the terminal equipment. The network adapter
board is the physical interface to the communications
network. It includes the appropriate jacks for connection to
the physical medium.
OLE
Object Linking and Embedding (OLE) is an interface
developed by Microsoft to link and embed data across
different applications. In this way external, but OLE-
compatible, texts, graphics or tables can be embedded in
other OLE applications. Linking OLE-compatible data is
carried out via a link to the appropriate le. The original le
remains untouched. During embedding, a copy of the le is
inserted into the document.
Glossary
W
Technical appendix
W.10 2596860000